Plastic oil self-lubricating maintenance-free cam bearing
Through the maintenance-free design of self-lubricating plastic oil in cam bearings, the problem of cam bearings being easily contaminated and requiring regular maintenance in dusty environments in the prior art is solved, and the effect of stable operation and maintenance-free under extreme environments is achieved.
Patent Information
- Application Number
- CN202421674909.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-16
AI Technical Summary
Existing cam bearings are susceptible to contamination in dusty environments, resulting in reduced performance and shortened life, and require regular maintenance, increasing operating costs and affecting the environment.
Maintenance-free cam bearings that are self-lubricated with plastic oil are used to fill the solidified plastic oil between the inner and outer rings and coat the rolling body with plastic oil, which reduces friction and wear and avoids lubricating oil leakage.
Stable operation in high load, dusty, high and low temperature environments can reduce maintenance frequency, reduce friction loss, enhance wear resistance, and achieve maintenance-free, significantly improve equipment operation stability and durability and reduce maintenance costs.
Smart Images
Figure CN222880151U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical engineering, in particular to a cam follower used in a cam mechanism, specifically a maintenance-free cam bearing which adopts plastic oil for self-lubrication. Background Art
[0002] Cams are widely used in many industrial fields. Since the cam mechanism can realize various complex motion requirements and has a simple and compact structure, it can accurately realize the required motion law. Cams are easy to wear. Factors that cause cam wear include load characteristics, geometric parameters, materials, surface roughness, corrosion, sliding, lubrication and processing conditions. Among them, lubrication conditions and material selection have a particularly large impact on wear life. In order to reduce friction and wear, a roller (cam bearing) is installed at the end of the follower to convert the sliding friction between the follower and the cam into rolling friction, so the friction and wear are small, but the cam bearing usually needs to be lubricated with lubricating oil or grease to reduce mechanical friction and wear; it is susceptible to contamination in dusty environments, resulting in performance degradation and shortened life. Existing lubrication methods often require regular maintenance, which increases operating costs and has a certain impact on the environment. Therefore, it is particularly important to develop a new type of cam bearing that can provide continuous and uniform lubrication and dustproof. Utility Model Content
[0003] In view of the shortcomings of the prior art, the utility model provides a plastic oil self-lubricating maintenance-free cam bearing, which can operate stably in high-load, dusty, high and low temperature environments, and independently form a lubricating film during operation, thereby reducing maintenance frequency, reducing friction loss, enhancing wear resistance and even being maintenance-free.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring, rolling elements, an inner ring (or a mounting shaft), and plastic oil; the plastic oil is filled between the inner ring (or the mounting shaft) and the outer ring, the plastic oil is coated on the rolling elements and rotates together with the rolling elements; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0006] The outer ring is connected along the contour surface of the cam to adapt to the rotation of the cam. It adopts a thicker wall design than ordinary bearings to withstand impact loads or heavy loads. The outer ring can be made of metal material, non-metal material, or a mixture, inlay, or coating of metal and non-metal.
[0007] The rolling elements are located between the outer ring and the inner ring (or mounting shaft) and are used to convert sliding friction into rolling friction;
[0008] The inner ring (or mounting shaft) is connected to the follower of the cam mechanism. The inner ring can be divided into a hollow ring or a threaded mounting shaft. According to the combination form, it can be divided into a separable type or a non-separable type. The mounting shaft structure can be divided into a concentric shaft or an eccentric shaft.
[0009] As a further solution of the utility model, the outer ring is a cylindrical or outer spherical structure, and the outer ring can be made of metal material, non-metal material, or a mixture, inlay, or coating of metal and non-metal.
[0010] As a further solution of the utility model, the rolling body is a needle roller, ball roller and roller structure, and its form includes single row, double row and multiple rows, without limitation; the rolling bodies can be separated by cages, or self-connected (without cages).
[0011] As a further solution of the utility model, the gap between the inner ring (or the mounting shaft) and the outer ring is filled with solidified plastic oil. The plastic oil coats the rolling element and rotates together with the rolling element. The self-lubricating properties of the plastic oil material are utilized to reduce friction and improve the load-bearing capacity, while avoiding the problem of leakage of lubricating oil and grease.
[0012] As a further solution of the utility model, plastic oil is a high molecular polymer material with special lubricating properties. Saturated lubricating oil is adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-absorbed into the polymer and stored.
[0013] As a further solution of the utility model, the plastic oil is a polymer such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid lubricating medium, which is injected into the bearing by injection molding, molding, vulcanization, etc. and then heated and solidified to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity.
[0014] As a further solution of the utility model, a wear-resistant coating is sprayed on the mating surface between the inner ring (or the mounting shaft) and the outer ring, and the wear-resistant coating is used to play the role of self-lubrication, leakage prevention and maintenance-free. The wear-resistant coating includes but is not limited to DLC coating, metal ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, MoS2 coating.
[0015] As a further solution of the utility model, holes are drilled in the radial direction, or grooves are cut in the axial or circumferential direction (the form of the grooves: straight groove type, circular ring type, racetrack type, spiral type, I-shaped, 8-shaped, etc. are not limited) on the mating surface of the mounting shaft and the outer ring, and plastic oil is filled in the groove. By utilizing the excellent wear resistance and self-lubricating properties of the plastic oil, a good lubrication state can be maintained during long-term operation, achieving the effect of maintenance-free operation.
[0016] The utility model has the following beneficial effects:
[0017] The utility model utilizes the efficient lubrication characteristics of plastic oil, significantly improves the stability and durability of cam bearing operation, reduces equipment failures caused by poor lubrication, thereby improving production efficiency and reducing maintenance costs.
[0018] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Schematic diagram of the structure of maintenance-free cam bearing needle roller structure filled with plastic oil;
[0020] Figure 2 Schematic diagram of the structure of the maintenance-free cam bearing ball structure filled with plastic oil;
[0021] Figure 3 The ball structure is filled with plastic oil, the inner ring is a conventional bearing inner ring, and the outer ring is plastic-coated;
[0022] Figure 4 It is a schematic diagram of the outer spherical structure and the internal needle structure filled with plastic oil;
[0023] Figure 5 It is a schematic diagram of the outer spherical structure and the internal double roller structure filled with plastic oil;
[0024] Figure 6 Schematic diagram of the structure where the shaft is sprayed with a wear-resistant coating and directly rubs against the outer ring.
[0025] The reference numerals are listed below:
[0026] 1. Outer ring; 2. Rolling element; 3. Inner ring (or mounting shaft); 4. Cage; 5. Plastic oil; 6. Wear-resistant coating; 77. Outer ring coated with engineering plastic / resin layer. DETAILED DESCRIPTION
[0027] The present invention will be further described below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all of the embodiments.
[0028] Reference Figure 1-Figure 6 As shown, the utility model is a plastic oil self-lubricating maintenance-free cam bearing, comprising: an outer ring 1, a rolling element 2, an inner ring 3, and a plastic oil 5; the rolling element 2 is located between the inner ring 3 and the outer ring 1; the plastic oil 5 is coated on the rolling element 2 and rotates together with the rolling element 2, playing the role of self-lubrication, leakage prevention, and maintenance-free.
[0029] The utility model can operate stably in high-load, dusty, high and low temperature environments, and can independently form a lubricating film during operation, thereby reducing maintenance frequency, reducing friction loss, enhancing wear resistance and even requiring no maintenance; it exhibits stable lubrication performance in various extreme environments (such as high temperature, low temperature, dusty, etc.), significantly improving equipment operation stability and durability; the solid form is not easy to leak, reducing the risk of environmental pollution; the plastic oil can independently form a lubricating film, reducing friction and wear between moving parts; it achieves maintenance-free performance of the cam bearing, reducing the user's use and maintenance costs.
[0030] In order to achieve the above purpose, the following technical solutions are adopted:
[0031] Outer ring 1, outer ring 1 is connected along the contour surface of the cam to adapt to the rotation of the cam. It adopts a thicker wall design than ordinary bearings to withstand impact loads or heavy loads. The outer ring can be made of metal material, non-metal material, or a mixture, inlay, or coating of metal and non-metal;
[0032] Rolling elements 2, located between the outer ring 1 and the inner ring 3 (or the mounting shaft), are used to convert sliding friction into rolling friction;
[0033] The inner ring 3 (or mounting shaft) is connected to the follower of the cam mechanism. The inner ring 3 can be divided into a hollow ring or a mounting shaft with a thread; according to the combination form, it can be divided into a separable type or a non-separable type; the mounting shaft structure can be divided into a concentric shaft or an eccentric shaft.
[0034] The plastic oil 5 is filled in the gap between the outer ring 1 and the inner ring 3 (or the mounting shaft), covers the rolling element 2, and rotates together with the rolling element 2. The self-lubricating property of the plastic oil material is used to reduce friction, improve the load-bearing capacity, and avoid the problem of leakage of lubricating oil and grease.
[0035] Plastic oil 5 is a high molecular polymer material with special lubricating properties. Saturated lubricating oil is adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.
[0036] As a further solution of the utility model, the outer ring 1 is a cylindrical or outer spherical structure, and the outer ring can be made of metal material, non-metal material, or a mixture, inlay, or coating of metal and non-metal.
[0037] As a further solution of the utility model, the rolling body 2 is a needle roller, ball roller and roller structure, and its form includes single row, double row and multiple rows, without limitation; the rolling bodies can be separated by cages, or self-connected (without cages).
[0038] Furthermore, the outer ring 1 and the inner ring 3 (or the mounting shaft) adopt a wear-resistant coating structure, and the wear-resistant coating is directly sprayed on the shaft, including but not limited to DLC coating (diamond-like carbon coating), metal ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, and PTFE, PEEK, PI, MoS2 coating, etc., which can play a wear-resistant role.
[0039] As a further solution of the utility model, holes are drilled in the radial direction, or grooves are cut in the axial or circumferential direction (the form of the grooves: straight groove type, circular ring type, racetrack type, spiral type, I-shaped, 8-shaped, etc. are not limited) on the matching surface of the mounting shaft 3 and the outer ring 1, and plastic oil is filled in the groove. By utilizing the excellent wear resistance and self-lubricating properties of the plastic oil, a good lubrication state can be maintained during long-term operation, achieving the effect of maintenance-free. Embodiment 1:
[0040] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring 1, rolling elements 2, an inner ring 3 (or a mounting shaft), and plastic oil 5; the plastic oil 5 is filled between the inner ring 3 (or the mounting shaft) and the outer ring 1, and the plastic oil 5 is coated on the rolling elements 2 and rotates together with the rolling elements 2; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0041] See attached Figure 1 As shown, the outer ring 1 of the cam bearing is a cylindrical structure, and the rolling element 2 is a needle roller structure; the needle rollers are fixed and separated from each other by a cage 4, or the needle rollers are arranged in a full circumferential row; the inner ring 3 is a threaded mounting shaft, and the gap between the outer ring 1 of the cam bearing and the mounting shaft is filled with plastic oil 5; the plastic oil is made of polymers such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium, which is injected into the bearing through injection molding, molding, vulcanization, etc., and then heated and cured to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity.
[0042] Embodiment 2:
[0043] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring 1, rolling elements 2, an inner ring 3 (or a mounting shaft), and plastic oil 5; the plastic oil 5 is filled between the inner ring 3 (or the mounting shaft) and the outer ring 1, and the plastic oil 5 is coated on the rolling elements and rotates together with the rolling elements; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0044] See also Figure 2 As shown, the outer ring 1 of the cam bearing is a cylindrical structure, and the rolling element 2 is a ball structure; the balls are evenly distributed through the cage or distributed in a circular arrangement without a cage; the inner ring is a threaded mounting shaft, and a dust cover or a sealing ring can be added to prevent dust; the gap between the outer ring 1 of the cam bearing and the mounting shaft is filled with plastic oil 5; the plastic oil is made of polymers such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium, which is injected into the bearing through injection molding, molding, vulcanization, etc., and then heated and cured to form a porous oil-containing lubricating material, and these micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity. Embodiment 3:
[0045] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring 1, rolling elements 2, an inner ring 3 (or a mounting shaft), and plastic oil 5; the plastic oil 5 is filled between the inner ring 3 (or the mounting shaft) and the outer ring 1, and the plastic oil 5 is coated on the rolling elements and rotates together with the rolling elements; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0046] See also Figure 3 As shown, the outer ring 1 of the cam bearing is a structure 77 with a coating layer, which is usually composed of engineering plastics or resin materials; the rolling element 2 is a ball structure; the balls are evenly distributed through the cage 4 or distributed in a circumferential arrangement without a cage; the inner ring 3 is the structure of the inner ring of a common bearing, and a dust cover or a sealing ring can be added; the gap between the outer ring 1 and the inner ring 3 of the cam bearing is filled with plastic oil 5; the plastic oil is made of a polymer such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid lubricating medium, which is injected into the bearing through injection molding, molding, vulcanization, etc., and then heated and cured to form a porous oil-containing lubricating material, and these micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity. Embodiment 4:
[0047] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring 1, rolling elements 2, an inner ring 3 (or a mounting shaft), and plastic oil 5; the plastic oil is filled between the inner ring (or the mounting shaft) and the outer ring, the plastic oil is coated on the rolling elements and rotates together with the rolling elements; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0048] See also Figure 4 As shown, the outer ring 1 of the cam bearing is an outer spherical structure, and the rolling element 2 is a needle roller structure; the needle rollers are fixed and separated from each other by a cage 4, or arranged in a full circumferential row; the inner ring is a threaded mounting shaft, and the gap between the outer ring 1 of the cam bearing and the mounting shaft is filled with plastic oil 5; the plastic oil is made of polymers such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium, which is injected into the bearing through injection molding, molding, vulcanization, etc., and then heated and cured to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity. Embodiment 5:
[0049] A plastic oil self-lubricating maintenance-free cam bearing comprises: an outer ring 1, rolling elements 2, an inner ring 3 (or a mounting shaft), and plastic oil 5; the plastic oil is filled between the inner ring (or the mounting shaft) and the outer ring, the plastic oil is coated on the rolling elements and rotates together with the rolling elements; the bearing has the functions of self-lubrication, leakage prevention, and maintenance-free.
[0050] See also Figure 5 As shown, the outer ring 1 of the cam bearing is an outer spherical structure, and the rolling element 2 is a double-row cylindrical roller structure; the cylindrical rollers are fixed and separated from each other by a cage 4; the inner ring is a threaded mounting shaft 3, and the gap between the outer ring 1 and the mounting shaft 3 of the cam bearing is filled with plastic oil 5; the plastic oil is made of polymers such as polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like lubricating medium, which is injected into the bearing through injection molding, molding, vulcanization, etc., and then heated and cured to form a porous oil-containing lubricating material. These micropores can accommodate lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity. Embodiment 6:
[0051] A self-lubricating maintenance-free cam follower comprises: an outer ring 1, an inner ring (or mounting shaft) 3, and a wear-resistant coating 6; the wear-resistant coating 6 is sprayed on the mating surface between the inner ring 3 (or mounting shaft) and the outer ring 1, and the wear-resistant coating plays the role of self-lubrication, leakage prevention, and maintenance-free. The wear-resistant coating includes but is not limited to DLC coating, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.
[0052] Reference Figure 6 As shown, holes are drilled in the radial direction on the mating surface between the mounting shaft and the outer ring 1, or grooves are cut in the axial or circumferential direction (the groove forms: straight groove type, circular ring type, racetrack type, spiral type, I-shaped, 8-shaped, etc. are not limited), and plastic oil is filled in the groove to prevent leakage and avoid maintenance.
[0053] In summary, the utility model has the following advantages:
[0054] Superior performance: It exhibits stable lubrication performance in various extreme environments (such as high temperature, low temperature, dust, etc.), significantly improving the operation stability and durability of the equipment.
[0055] Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution.
[0056] Low friction and wear: Plastic oil can form a lubricating film on its own, reducing friction and wear between moving parts.
[0057] Maintenance-free: The cam bearing is maintenance-free, which reduces the user's use and maintenance costs.
[0058] By utilizing the efficient lubrication properties of plastic oil, the stability and durability of cam bearing operation are significantly improved, and equipment failures due to poor lubrication are reduced, thereby improving production efficiency and reducing maintenance costs, demonstrating the innovation and practicality of the present invention in the field of cam bearings.
[0059] The technical principle of the utility model is described above in combination with specific embodiments, which are only preferred embodiments of the utility model. It should be understood that although this specification is described according to the embodiments, not every embodiment contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art, all of which belong to the protection scope of the utility model.
Claims
1. A plastic oil self-lubricating maintenance-free cam bearing, characterized in that: include: Outer ring, rolling element, inner ring, plastic oil; the rolling element is located between the inner ring and the outer ring; the plastic oil is coated on the rolling element and rotates with the rolling element, playing the role of self-lubrication, leakage prevention and maintenance-free.
2. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 1, characterized in that: The outer ring is a cylindrical or outer spherical structure.
3. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 1, characterized in that: The rolling elements are needle rollers, ball rollers, and roller structures, and are arranged in single row, double row, and multiple rows; the rolling elements are separated by cages or are self-connected.
4. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 1, characterized in that: The inner ring is a hollow ring or a threaded mounting shaft.
5. The plastic oil self-lubricating maintenance-free cam bearing according to claim 1, characterized in that: The gap between the inner ring and the outer ring is also filled with solidified plastic oil.
6. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 1, characterized in that: The plastic oil is a high molecular polymer material with saturated lubricating oil adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.
7. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 1, characterized in that: A wear-resistant coating is sprayed on the mating surface between the inner ring and the outer ring, and the wear-resistant coating is used to achieve self-lubrication, leakage prevention and maintenance-free functions; the wear-resistant coating includes but is not limited to DLC coating, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.
8. The plastic oil self-lubricating maintenance-free cam bearing according to claim 1, characterized in that: When the inner ring is a threaded mounting shaft, holes are drilled in the radial direction or grooves are cut in the axial or circumferential direction on the matching surfaces of the mounting shaft and the outer ring, and plastic oil is filled in the holes or grooves.
9. A plastic oil self-lubricating maintenance-free cam bearing as claimed in claim 8, characterized in that: The shapes of the grooves are straight groove type, circular ring type, racetrack type, spiral type, I-shaped type and figure 8 type.